Overview
The Phoenix optical transceiver module is used to provide connectivity to the fiber
connections between nodes. The A8972FLC optical transceiver module contains a single
optical transceiver with dual LC connectors and is used as an ‘end node’ in either a point
to point, or linear system. The A8974FLC optical transceiver module features two optical
transceivers with two dual LC connectors and is used in repeating nodes within a linear
system as well as all nodes in a self-healing ring system.
Tools and materials required
The optical module is held in place with simple thumbscrews with screwdriver slots.
The only tool recommended is a small flat blade screwdriver.
Installation instructions:
1. Install optical transceiver module in slots 9 and 10 (color-keyed white) and secure.
INSERT OPTICAL TRANSCEIVER MODULES IN SLOTS 9-10 (White)
2. Connect fiber:
Connect single-mode fiber optic cables by using LC connectors. Each port connects to a
pair of fibers. The top fiber in a port is the laser output (Tx) and the bottom fiber is the
photo diode input (Rx). In a point-to-point system, connect the optic in port A from the
first node to the optic in port A in the second node. Remember that the two fibers need
to be crossed, so that the laser output on one node is connected to the photodiode
input in the other node. This can be verified by observing the corresponding LEDs as
shown in the table below.
In a linear system, connect the fiber to Optic A in the end node (node with only one
fiber transceiver) to Optic B in the subsequent node. Repeat until the ‘headend’ node
is reached, where the fiber must go into Optic A .
In self-healing ring systems, simply connect Optic A from one node to Optic B on the
next node, throughout the ring.
** CAUTION:
Use caution when inserting it into a slot adjacent to an existing module. It is best to install this
module in your node first, to avoid potential damage to components on the back of this module.
* WARNING:
Insure main power is off when installing or removing.
Installing the Optical Transceiver Module
3
